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Chapter 7: Problem 74

Can the percent yield of a chemical reaction ever exceed \(100 \% ?\)

Short Answer

Expert verified
Answer: No, the percent yield of a chemical reaction cannot exceed 100% as the actual yield cannot be greater than the theoretical yield. The theoretical yield represents the maximum possible amount of product that can be formed based on the stoichiometry of the reaction. A percent yield over 100% is likely due to experimental error or inaccurate measurements.

Step by step solution

01

Definition of Percent Yield

Percent yield is a measure of the efficiency of a chemical reaction. It is calculated by comparing the actual yield (the amount of product produced by a reaction) to the theoretical yield (the maximum amount of product that could be produced according to the stoichiometry of the reaction). The formula for percent yield is: Percent Yield = \(\frac{Actual Yield}{Theoretical Yield} \times 100\%\)
02

Theoretical Yield

The theoretical yield is the maximum amount of product that can be produced in a chemical reaction based on the stoichiometry of the reaction. It assumes that all of the limiting reactant is consumed and there are no side reactions, losses, or other factors that would reduce the amount of product formed.
03

Actual Yield

The actual yield is the amount of product that is actually produced in a real-world reaction, taking into account side reactions, losses, and other factors that may reduce the amount of product formed.
04

Conditions for Percent Yield to Exceed 100%

For the percent yield to exceed 100%, the actual yield would have to be greater than the theoretical yield. However, this is not possible since the theoretical yield is the maximum possible amount of product that can be produced from a given amount of reactants. Conclusion: The percent yield of a chemical reaction cannot exceed 100% as the actual yield cannot be greater than the theoretical yield, which is the maximum possible amount of product formed based on the stoichiometry of the reaction. Any case with a reported percent yield over 100% is likely due to experimental error or inaccurate measurements.

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